Analog Devices EVAL-AD9081 User Manual

UG-1829 EVAL-AD9081/EVAL-AD9082/EVAL-AD9986/EVAL-AD9988 User Guide
Rev. 0 | Page 12 of 26
HMC7044
AD9081/AD9082/AD9986/AD9988
CRYSTAL
OSCILLATOR
EXT_HMCREF
PLL1
CLKIN0/
RFSYNCIN
CPOUT1 OSCIN
VOLTAGE CONTROLLED
CRYSTAL OSCILLATOR
SCLKOUT3
CLKOUT0, CLKOUT6, CLKOUT8
CLKOUT10, CLKOUT12, SCLKOUT13
TO FPGA VIA FMC CONNECTOR
CLKIN1/
FIN
PLL2
OUTPUT
DISTRIBUTION
DIVIDER
SYNC
BLOCK
PLL
CLKOUT2
CLKINP/
CLKINN
SYSREFP/
SYSREFN
C4D/C6D
C3D/C5D
C2C/C4C
C1C/C3C
EXT_CLK
EXT_SYS_P/
EXT_SYS_N
ADC
DAC
24165-015
Figure 20. Default Clocking Scheme Used for the AD9081, AD9082, AD9986, or AD9988 Evaluation Board
SET UP THE INSTRUMENTATION
To use on-board clocking, the user must only provide an analog
input signal using a signal generator. To analyze DAC outputs, a
spectrum analyzer is needed.
The following are recommended instruments and connectors:
 Signal generator: a low phase noise signal generator, such
as the Rohde & Schwarz SMA (100A or 100B) or
Keysight UXG/EXG series. Note that the performance
listed in the product data sheet is from the Rohde &
Schwarz SMA100B with the B-711 option.
 Spectrum analyzer: Keysight PXA/UXA or Rohde &
Schwarz FSW/FSWP.
 Cables: use a shielded, RG-58, 50 Ω coaxial cable.
Ensure that the 10 MHz references are shared between the
instruments.
Analog Devices recommends the coaxial, 48.0 in. (1.2 m or
4.0 ft), RG316 DS, SMA to SMA, male to male cable assembly
from Cinch Connectivity Solutions Johnson, Part Number 415-
0033-048 for the setup.
Set Up the Spectrum Analyzer
Analog Devices recommends the following configuration for
the spectrum analyzer:
 Start frequency = 50 MHz (or 0 MHz)
 Stop frequency = 5 GHz
 Resolution bandwidth = 30 kHz
 Use an average or rms detector setting and set the input
attenuation to 6 dB or as desired
These settings can be changed to satisfy the particular use case.
It is recommended to have all the instruments share a common
reference. Usually, this common reference is achieved by
connecting the 10 MHz reference output from one instrument
to the reference input of the next, and so on.

Analog Devices EVAL-AD9081 Specifications

General

Brand	Analog Devices
Model	EVAL-AD9081
Category	Transceiver
Language	English